Thank you for your reply with further information.
The C:\ProgramData\Alwil Software\Avast5\ may well be a hidden folder so you would need to have hidden files and folders displayed, I absolutely hate that default option on windows.
Right, so do I, it is completely dumb like the new Libraries, the failed searches on them, the display behaviour on the left column of the explorer, etc. (
Just have a look here, where you can also find some cures.) Therefore, the very first thing I do with a new installation is to end up with all hidden stuff on my computer. They only hide information about what is going on from our knowledge. Futile and hopeless.
I could not find the mentioned avast5.ini file because I am stupid. Instead of looking where you told me I searched under "Program Files...", but as you insisted I understood it should exist somewhere else, so I searched everywhere in the computer and finally found it exactly where you told me. I apologise for being so dull and giving you additional work.
It is a 16,1 KB (in my case) containing many settings, as well as task names corresponding to some registry value names in the key I mentioned on my first post (e.g.: Task1={EC4ECEDA-3E3B-4027-ABFE-29A5122D64D6}. Most other keys have data stored, but those either have no data or have a @ character only, but now I can try and find more if it exists. Then I can save the .ini file any key with the settings for a later usage. Bad things happen with all computers and we have to prevent. Lately, the mother board failed and spoiled not the system disk, which would have been of lesser importance, but unfortunately my backup hard disk.
If it were not for your insisting on the avast5.ini file I wouldn't have come to any conclusion, but now I can go ahead by myself thanks to your very useful help.
Thank you very much for everything.